In the captivating web novel Brigitte Wants to be Happy!, Princess Yerenika faces a tragic fate as a mere side character. But when a woman reincarnates into Yerenika's role, she seizes the chance to alter her destiny and cheat death. Plunged into the story's timeline before the main characters and the antagonist come into being, Yerenika disrupts the narrative by thwarting her sister's abduction, a pivotal event that triggers a chain of calamities. Yet, her scheme backfires when she falls prey to King Euredian of Bellecourt, whose magical realm proves perilous to Yerenika. Determined to erase the future tyrant Dekalb—who would have caused immense suffering—Yerenika embarks on a risky mission to rewrite the past. By captivating Euredian and diverting his path towards a different union, Yerenika aims to reshape history and avert the sinister legacy that once loomed over the tale.